1312111102331 has 16 divisors (see below), whose sum is σ = 1411204819968. Its totient is φ = 1217100746400.

The previous prime is 1312111102249. The next prime is 1312111102343. The reversal of 1312111102331 is 1332011112131.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1312111102331 is a prime.

It is a super-2 number, since 2×1312111102331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1312111102361) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6486431 + ... + 6685656.

It is an arithmetic number, because the mean of its divisors is an integer number (88200301248).

Almost surely, 2^{1312111102331} is an apocalyptic number.

1312111102331 is a deficient number, since it is larger than the sum of its proper divisors (99093717637).

1312111102331 is a wasteful number, since it uses less digits than its factorization.

1312111102331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13172242.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 1312111102331 its reverse (1332011112131), we get a palindrome (2644122214462).

The spelling of 1312111102331 in words is "one trillion, three hundred twelve billion, one hundred eleven million, one hundred two thousand, three hundred thirty-one".